Science Links Japan | Calculation of an equivalent contact point stiffness matrix with respect to ground reaction forces during running.

Calculation of an equivalent contact point stiffness matrix with respect to ground reaction forces during running.

Accession number;05A0025461

Title;Calculation of an equivalent contact point stiffness matrix with respect to ground reaction forces during running.

Author; KOIKE SEKIYA (Univ. of Tsukuba) NAKAYA SEIGO (Graduate School, Univ. Tsukuba, JPN) FUJII NORIHISA (Univ. of Tsukuba) AE MICHIYOSHI (Univ. of Tsukuba)

Journal Title;Nihon Kikai Gakkai Supotsu Kogaku Shinpojiumu, Shinpojiumu Hyuman, Dainamikusu Koen Ronbunshu

Journal Code:L1198A

ISSN:

VOL.2004;NO.;PAGE.193-198(2004)

Figure&Table&Reference;FIG.10, TBL.1, REF.11

Pub. Country;Japan

Language;Japanese

Abstract;The purpose of this study was to calculate an equivalent stiffness matrix with respect to ground reaction force during running motion. Eight Subjects' 2-D images for the motion analysis and ground reaction forces were recorded by using a high speed camera and two forceplatforms. The angular velocities which contribute to vertical direction movement were extracted from joint angular velocities using Jacobian Matrix. Joint stiffness of each joint was calculated from a joint torque and the angular velocity. An equivalent stiffness matrix on center of pressure was transformed from the joint stiffnesses. At comparison of heel striker with forefoot striker, differences were observed at the equivalent stiffness matrix. The results of this study suggest that the equivalent stiffness matrix has a potential to quantify the characteristics of runners and running forms. (author abst.)

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